The Siemens SENTRON 3VA2440-5HL32-0AA0 is a 3-pole molded case circuit breaker rated for 400 A continuous current at up to 70 °C ambient — no derating needed across the full 40–70 °C range, which simplifies panel thermal budgeting. At 240 V it interrupts 187 kA; at 415 V and 440 V it holds 121 kA, dropping to 75.6 kA at 500 V and 9 kA at 690 V.
The 3-pole footprint matches the existing 3VA family cutout; if you're swapping an older 3VA2116 frame, verify the lug kit and accessory compatibility (the ETU320 shares the same communication and auxiliary-contact platform).
What the ETU320 trip unit gives you
The ETU320 is an electronic overcurrent release — no thermal bimetal, so trip curves stay consistent across ambient shifts. It's designed for line protection (cable and busbar), not motor or generator protection. There's no ground-fault monitoring version on this variant, no undervoltage release, and no communication function. If you need those, the 3VA family has sibling order codes with those options; this one is a straight feeder breaker with adjustable LS (long-time and short-time) pickup and delay settings via the trip unit dials.